Nailing machine



W. N. OEHM AND G. POWELL.

NAIL ING MACHINE.

APPLICATION FILED J ULY 20,1921.

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APPLICATION FILED JULY 20,1921.

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WILLIAM N. OEHM'. AND GOMERT POWELL, OF MICHIGAN CITY, INDIANA.

Nannie MACHINE.

Specification of Letters Patent.

Patented Apr. 11, 1922.

Original application filed December 2, 1920,, Serial No. 427,821. Divided and this application filed July To all whom it may concern Be it known that we, WILLIAM N. Onrnr and GOMERT POWELL, citizens, respectively, of the United States and of the Kingdom of Holland, and residents of Michigan City, county-of Laporte, and State of Indiana, have jointly invented certain new and useful Improvements in Nailing Machmes, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to a nailing machine including'a pneumatic hammer, and adapted especially for driving the nails 1n floor boards, particularly the flooring of cars; This application is a division of our application for Letters Patent for improvements in nailing machines filed December 2, 1920, Serial No. 427,821.

Among the objects of the present invention are to provide for a ready shifting of the machine and permanently positioning it for driving a nail; to provide a simple and efiicient nail-feeding device, and to secure rapidity of operation. Another object is to provide means for advancing the hammer to the Work as the nail is being driven, this means being especially designed for use with a heavy hammer, such as must be employed in driving spikes.

An embodiment of the invention is illustrated in the accompanying drawings, in which-- Fig. l is a longitudinal section of the machine, partly in elevation, on the line 1 1 of Fig. 2;

Fig. 2 is a side elevation'of the machine;

Fig. 3 is a plan section on the line 3-3 of Fig. 1;

Fig. 4 is a sectional view on the line 44 of Fig. 3;

Fig. 5 is a detail section on the line 5-5 of Fig. 3; and i Fig. 6 is a detail section on the line 6-6 of Fig. 4. a The machine comprises a pneumatic hammer, conventionally shown at 10, and which may be of any desired construction having the usual handle 11 and controlling valve 12. This hammer telescopically enters a tube 13, the lower end 14 of which is contracted to form a nipple and is provided with a sleeve having spurs 15 which will engage the board into which the nail is to be Serial No. 486,112.

driven and hold the machine'in proper position.

A pedal 16, adapted to have its outer end rest loosely upon the floor, is connected by means of links 17 18, to a pair of pull rods 19, 20, attached to the upper end of the hammer casing, and a spring 21, coiled about one of the rods, as 19, and reacting between the upper end thereof and a guide bracket 22 attached to the tube 13, normally holds the hammer in elevated position.

A feed tube 23 enters the tube 13 laterally for delivering nails thereto, and which are fed through the feed tube from a suitable receptacle, such as a funnel 2 1, connected therewith by means of a tube 25. The size of the tube 25 is such that the nails pass through singly, and as each nail descends it is arrested at the upper end'of the tube 23 by a pivoted dog 26 projecting into its path a sufiicient distance to certainly engage its head. This dog is held in nail-em gaging position by means of a spring 27.

A trip arm 28 is pivoted at 29 to an arm 30 secured to the pivot of the dog 26, and projects into the path of a trip 31 carried by one of the pull rods, as 20. As the hammer is moved upwardly by the action of the spring 21 the trip 31 engages below the arm 28 and turns the'dog 26, releasing the nail X and permitting it to drop into the tube 13. As the hammer is drawn down the trip 31 passes the trip arin 28, turning it on its pivot, and this latter arm is immediately returned to its normal position by the action of a spring 32.

' lVithin the lower contracted end 14: of the tube 13 there is slidingly fitted a bushing 33, the bore of which is suitable to allow the passage of a nail therethrou h while holding it in upright position. he downward movement of the bushing 33 is limited by a screw stud 34, prpjecting through a longitudinal slot in the tube section 14. As the machine is positioned for the driving of a nail the bushing 33 is moved upwardly a short distance by its engagement with the floor and insures the entry thereinto of the nail now within the body portion of the tube 13.

A punch or nail set 35, forming an element of the pneumatic hammer, is positioned to bear upon the nail when the latter occupies the bushing 33, and to drive it as the Hut-shoal] hammer is operated. Thenail set has a limited longitudinal -movement' Within the lower end of the barrel of the hammer to permit the latter to be advanced after each blow is struck.

The nail feeding, positioning and driving means are not claimed in this application. In using the device the operatormay keep one foot continuously on the pedal 16. After driving a spike he steps forward with the foot which had rested on the floor. raises the machine by hand, and shifts it to its I reciprocable in the tube, a pedal for advancing the hammer, pivoted at one end to said hammer below the springs and having its other end adapted to drag along the floor, 2, A movable nailing machine comprising, in combination, a tube, a spring-retracted hammer in said tube, a handle therefor, and a pedal for advaneing the hammer, pivoted thereto at one end and havin its other end adapted to drag" along the oor,

3. A movable nailing machine comprising, in combination, a tube, a spring-retracted hammer reciprocable in the tube, and a pedalfor advancing the hammer having one end adapted to drag along the floor.

4. Ina nailing device, in combination, a tube having a nail-positioning nipple, aspring-retracted pneumatic hammer reciprocable in the tube, a pedal for advancing the hammer pivoted at one end to said ham-- mer and having its other end adapted to drag along the floor.

5. A movable nailing machine comprising, in combination, a suitable frame, a springretracted hammer having a handle, a pedal for advancing the hammer and having one end adapted to drag along the floor when the machine is moved forward.

WILLIAM N.; OEHM. GOMERT POWELL, 

